Traveller for ring spinning and twisting machines



p 1968 TAKESHI KIMOTO 3,399,497

TRAVELLER FOR RING SPINNING AND TWISTING MACHINES Filed June 9, 1966 United States Patent 3,399,497 TRAVELLER FOR RING SPINNING AND TWISTING MACHINES Takeshi Kimoto, 238 Roku-no-tsubo Higashi-Oshima, Amagasaki, Hyogo Prefecture, Japan Filed June 9, 1966, Ser. No. 556,444 Claims priority, application Japan, June 24, 1965, 40/51,876 6 Claims. (Cl. 57-125) ABSTRACT OF THE DISCLOSURE A traveller for use with ring spinning and twisting machines in which a wire of substantially uniform crosssection having a width and thickness of a ratio of more than four to one is soconstructed that the portion from the contacting point between the traveller and ring to the point of its leg portion is provided with a fiat section and the remaining arcuate portion is defined by an inner con- .vex surface and a concave outer surface with a yarn being arranged to run in contact with said convex surface.

This invention relates to travellers for use on rings spinning and twisting machines, and more specific-ally to travellers having a construction adapted for use for the spinning and twisting of yarns composed particularly of man-made fibers such as viscose rayon, synthetic fiber, and their blends.

In the spinning and twisting of such yarns, if there is a great frictional resistance between the yarn and traveller the possibilities of a yarn fluffing increase and production of more white powder will result from the spinning of the yarn This white powder, upon falling and settling on the ring or traveller, impedes lubrication between the traveller and ring, thus accelerating the wear and, as a consequence, the life of the traveller.

Furthermore, the friction existing between the yarn and traveller generates heat which causes a fusion of fibers, especially so in the case of man-made fibers having a low softening point, thus resulting in the production of yarns having a low strength. On the other hand, a wide area of the traveller contact with the ring makes it possible to stabilize the behaviour of the traveller in running and hence reduce yarn breakage, while a wide area of heat radiation permits the smooth diffusion of the heat caused by such frictional contact between the traveller and ring, thereby preventing occurrence of a fused and hence a fuzzy yarn, particularly in the case of man-made fibers.

Heretofore, it has been the practice to use C-shaped and vertical travellers for the spinning and twisting operations and these travellers were basically of circular, fiat rectangular or semi-circular cross-section or a combination thereof, namely, a circular cross-section at the thread guiding zone but of flat cross-section at the ring contacting zonerEach of these travellers has, as every one familiar with a spinning mill knows, its own advantage and dis advantage. For example, a traveller of circular crosssection is advantageous in that it presents a small frictional resistance at its thread-guiding zone, while being disadvantageous in that it has a small area of contact between the traveller and the ring and hence a small area of heat radiation, thereby resulting in a greater burn and shorter life of the traveller. A traveller of flat rectangular cross-section will provide a wide area of contact between the traveller and the ring and hence of heat radiation, while suffering from the dis-advantage that it presents a great frictional resistance at its thread-guiding zone. On the other hand, although travellers of semi-circular crosssection and of a combined type as previously mentioned "ice has an improved feature over the other two types in certain aspects, such travellers are objectionable in that the manufacture of a material wire and the formation of the traveller involve considerable difficulties.

Although the disadvantages of each such traveller has long been recognized by persons familiar with spinning mills, no traveller has to date been introduced or proposed, which would satisfy all the requirements specified by the mills.

A principal object of the present invention is to provide a traveller of an improved construction which is not only easy to manufacture in large quantities and at a lower cost since it can be shaped continuously from a wire of uniform configuration, but also is capable of overcoming various disadvantages encountered with the use of the conventional travellers.

Further objects and advantages of the present invention will become more clearly understood to persons skilled in the art from the following detailed description and accompanying drawings showing certain embodiments of the invention, and in which drawings:

FIG. 1 is a view front elevation of a traveller incorporation my invention,

FIG. 2 is a sectional View taken on line X-X of FIG. 1, the view looking in the direction of the arrows,

FIG. 3 is a perspective view of the traveller in the running position, and showing the relative position of the traveller and ring,

FIG. 4 is a perspective view of the traveller illustrated in FIG. 1,

FIG. 5 is a view in side elevation of a C-shaped traveller, showing another embodiment of my invention,

FIG. 6 is a view in front elevation of a vertical traveller, showing still another embodiment of my invention,

FIG. 7 is a view in side elevation of the traveller illustrated in FIG. 6, and

FIG. 8 is a view taken on Y-Y of FIG. 6, the view looking in the direction of the arrows.

FIGS. 1-4 show a C-shaped traveller of the invention formed by a wire of flat, uniform cross-section having a Width and a thickness ratio of more than 4 to 1 or preferably 7 to 1.

The C-shaped traveller T consists of a leg portion 2, a bow portion 3 and a yarn is arranged to run so as to keep in contact with the belly side of the blow portion 3. The bow portion 3 is so constructed that the inner surface of the portion, approximately 10 above the horizontal axis line HH, i.e., the inner surface of the arcuate portion extending from 4 to 5 of contact point 1 of a ring R and traveller T (corresponding to bearing center B of the ring shown in FIG. 3) is defined by a gentle curve convex surface S of a trough-like shape to permit the smooth running of a yarn, and the surface opposite to the curved surface S is defined by a curved concave surface S. With such construction, the side surface of the portion is not edgy like that of a flat wire so that the frictional resistance of a fiber can be reduced to a sufficient degree. The leg portion 2 having a plain flat section is of a larger width than the bow portion, thereby permitting, as shown in FIG. 2, a stable and high-speed runing of the traveller with no danger of the traveller being tilted or distorted during running, and at the same time, offering a larger area of heat radiation by virture of its larger circumferential length.

It is also possible to construct terminal ends 6 of its leg portion 2 into an arcuate shape so as to prevent the same from coming into contact with the ring in an irregular running.

Since the traveller is capable of being tilted in running, the terminal ends of leg portion 2 may be twisted in advance as shown in FIG. 5, so that the contacting area is further enlarged to ensure a uniform frictional wear of the traveller.

This invention also may be adapted to a vertical traveller as shown in FIG. 6. In such situation, it is possible to construct only the inner surface of a threadguiding part 7 into a trough-like shape provided with a gently curved convex surface S and the opposite outer surface into a curved concaved surface S to permit a smooth running of a yarn as shown in FIGS. 7 and 8.

In the present traveller essentially including such gently curved thread-guiding part and its leg portion having a thin fiat section and a greater width which contacts the ring, the effects and advantages obtainable are as described below.

(a) While the presence of a small frictional resistance between the traveller and yarn offers a small winding tension thus allowing the use of a slightly heavier traveller than normally employed, the existence of a large area of contact between the ring and traveller serves for preventing the tilting or distorting of the traveller thereby resulting in a stabilized running position of the traveller, fewer breaks in the yarn, a reduced friction loss and burn of the traveller as well as a longer life of the traveller and ring.

(b) Since the yarn is maintained in contact with the arcuate narrow trough-shaped portion while running and is restrained from moving towards the leg or fiat portions, the yarn is in no danger of being trapped between the traveller and ring. 1

(c) In the event the traveller is tilted in its running position and is apt to make contact with the narrower portion, it will return to its stable running position.

(d) When the flat leg portion of the traveller is apt to make contact with the ring surface, the traveller can easily return to its normal running position by virture of the air resistance at its upper zone cause by the different mode of contact with the air between the arcuate surface of the trough-like shape and the leg portion.

(e) Inasmuch as the area at which the upper zone of the traveller makes contact with the air, the effect of frictional heat by the ring is small.

(f) The larger width and the trough-like shape of the traveller ensure an easy handling of the traveller by the finger tips.

(g) Compared to a traveller having arcuate characteristics at its thread guiding zone and flat at its ring contacting zone, a traveller of thin flat cross-section provided with a trough-like shape at its thread guiding zone ensures a lowering of the center of gravity thus resulting in a stabilized running position of the traveller.

(h) Since travellers can be produced continuously from a wire of uniform configuration, such travellers can be easily fabricated in large quantites and at a lower unit expenditure.

This invention is not to be confined to any strict conformity to the showings in the drawings but changes or modifications may be made therein so long as such changes or modifications mark no material departure from the spirit and scope of the appended claims.

Having thus described the nature of the present invention, what I claim herein is:

1. A traveller for use with ring spinning and twisting machines including a wire of a substantially uniform cross-section having a width and a thickness of a ratio of substantially more than four to one, said wire being so constructed that the portion from the contacting point between the traveller and ring to the point of its leg portion is provided with a flat section and the remaining arcuate portion is defined by an inner convex surface and an outer concave surface, with a yarn being arranged to run in contact with the convex surface of said remaining arcuate portion said flat section having greater width than said bow section to provide greater stability at contact point between ring and traveller.

2. A traveller for use with ring spinning and twisting machines including a wire of substantially uniform crosssection having a width and a thickness of a ratio of substantially more than four to one, said ring being so constructed that the portion from the contacting point between the traveller and ring to the point of its leg portion is provided with a fiat section and the remaining arcuate portion is defined by an inner convex surface and an outer concave surface, and the entire body of said traveller including said arcuate portion being of C-shape, with a yarn arranged to run in contact with the convex surface of said arcuate portion and said flat section having greater width than said how section to provide greater stability at contact point between ring and traveller.

3. The traveller for use with ring spinning and twisting machines as claimed in claim 1, in which both points of the leg portion are of an arc shape so as to avoid frictional contact with the ring at the time of irregular running.

4. The traveller for use with ring spinning and twisting machines as claimed claim 1, in which both points of the leg portion are twisted for providing a wider surface contact with the ring body to make the friction of the traveller uniform.

5. The traveller for use with ring spinning and twisting machines as claimed claim 1, in which both points of the leg portion are twisted for providing a wider surface contact with the ring body to make the friction of the traveller uniform and are further of arc shape so as to avoid frictional contact with the ring at the time of or irregular running.

6. A traveller for use with ring spinning and twisting machines including a wire of substantially uniform cross-section having a width and a thickness of a ratio of substantially more than four to one, said wire being so constructed that the portion from the contacting point between traveller and ring to the point of its leg portion is provided with a flat section and the remaining arcuate portion is defined by an inner convex surface inside and an outer concave surface, said flat section having greater width than said bow section to provide greater stability at contact point between ring and traveller and the entire body of said traveller including said arcuate portion being of a vertical type, with a yarn arranged to run in contact with the convex surface of said arcuate portion.

References Cited UNITED STATES PATENTS 1,636,992 7/1927 Gilligan 57--125 1,666,714 4/1928 Merrill 57125 1,816,479 7/1931 Gilligan 57125 1,937,676 12/ 1933 Wentworth 57-125 2,052,735 9/1936 Wentworth 57-125 STANLEY N. GILREATH, Primary Examiner. WERNER H. SCHROEDER, Assistant Examiner. 

